How to Erase Data From a Computer Before Selling. When you sell a computer, it is always in your best interest to completely erase all of the data on your hard drive before the computer changes hands.

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To truly erase files, you need to use a destructive erase that actually writes over the existing data in each “notebook” as part of the process.

If you want to securely erase sensitive files, or you’re selling your device to another person, you’ll need to know how to permanently delete files from your computer, tablet, or phone.

Want to permanently wipe data from a hard drive or solid-state drive? Here's how to use the HP Disk Sanitizer or Secure Erase on Windows PC.

What if your tech device or computer is lost or stolen? You can wipe your devices remotely, but you do need to set up the capability ahead of time.

To make sure the IT department keeps its mitts of your personal files, run a file-shredding utility to permanently destroy the data.

Uninstalling Steam from your PC will remove not only Steam, but also all your games, downloadable content, and save files.